Watlow 12LS User Manual
ANAFAZE 12LS
Installation And Operation Manual
Revision 3
August 1, 1991
Copyright (c) 1990
Watlow Anafaze, Incorporated
334 Westridge Dr
Watsonville, CA 95076
Phone: 831-724-3800
Facsimile: 831-724-0320
All RIGHTS RESERVED: No part of this publication may be reproduced, stored in a retrieval
system or transmitted in any form by any means; electronic, mechanical, photo copying,
recording, or otherwise, without the prior written permission of ANAFAZE, Inc.
Printed in U.S.A.
STATEMENT OF WARRANTY
ANAFAZE, Incorporated warrants that the Products furnished under this Agreement will be free
from material defects in material and workmanship for a period of one year from the date of
shipment. The customer shall provide notice to ANAFAZE, Incorporated of any defect within
one week after the Customer's discovery of such defect. The sole obligation and liability of
ANAFAZE, Incorporated under this warranty shall be to repair or replace, at its option, without
cost to the Customer, the product or part which is so defective and as to which such notice is
given.
Upon request by ANAFAZE, Incorporated, the product or part claimed to be defective shall
immediately be returned at the Customer's expense to ANAFAZE, Inc. Replaced or repaired
products or parts will be shipped to the Customer at the expense of ANAFAZE, Incorporated
There shall be no warranty or liability for any products or parts which have been subject to
misuse, accident, negligence, failure of electric power or modification by the Customer without
ANAFAZE, Incorporated's written approval. Final determination of warranty eligibility shall be
made by ANAFAZE, Incorporated. If a warranty claim is considered invalid for any reason, the
Customer will be charged for services performed and expenses incurred by ANAFAZE,
Incorporated in handling and shipping the returned unit.
As to replacement parts supplied or repairs made during the original warranty period, the
warranty period of the replacement or repaired part shall terminate with the termination of the
warranty period with respect to the original product or part.
THE FOREGOING WARRANTY CONSTITUTES THE SOLE LIABILITY OF
ANAFAZE INCORPORATED AND THE CUSTOMER'S SOLE REMEDY WITH
RESPECT TO THE PRODUCTS AND IS IN LIEU OF ALL OTHER WARRANTIES,
LIABILITIES AND REMEDIES. EXCEPT AS THUS PROVIDED, ANAFAZE, INC.
DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING ANY
WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR
PURPOSE.
PLEASE NOTE EXTERNAL SAFETY DEVICES MUST BE USED WITH THIS
EQUIPMENT SEE WARNING ON NEXT PAGE.
PLEASE -- See last page to register your name and address with ANAFAZE for technical
updates.
ii
WARNING
ANAFAZE HAS MADE EFFORTS TO ENSURE THE RELIABILITY AND SAFETY OF
THE 12LS AND PROVIDE RECOMMENDATIONS FOR ITS SAFE USE IN SYSTEMS
APPLICATIONS. PLEASE NOTE THAT IN ANY APPLICATION, FAILURES CAN
OCCUR THAT WILL RESULT IN FULL CONTROL OUTPUTS OR OTHER
OUTPUTS THAT MAY CAUSE DAMAGE OR UNSAFE CONDITIONS IN THE
EQUIPMENT OR PROCESS CONNECTED TO THE ANAFAZE 12LS.
GOOD ENGINEERING PRACTICES, ELECTRICAL CODES, AND INSURANCE
REGULATIONS REQUIRE INDEPENDENT, EXTERNAL, SAFETY DEVICES BE
USED TO PREVENT POTENTIALLY DANGEROUS OR UNSAFE CONDITIONS
ASSUMING THAT THE ANAFAZE 12LS CAN FAIL WITH OUTPUTS FULL ON, OR
OUTPUTS FULL OFF, OR OTHER CONDITIONS THAT WOULD BE UNEXPECTED.
THE 12LS INCLUDES A RESET CIRCUIT THAT WILL SET THE CONTROL
OUTPUTS OFF OR TO THE DATA STORED IN MEMORY IF THE
MICROPROCESSOR RESETS -- NORMALLY THE RESULT OF A POWER FAILURE
AND POWER RETURN. IF THERE IS ANY POSSIBILITY THAT A RESTART
BASED ON MEMORY WILL BE UNSAFE, THE 12LS MUST BE PROGRAMMED TO
START WITH OUTPUTS OFF. FOR ADDITIONAL SAFETY, THE COMPUTER OR
OTHER HOST DEVICE SHOULD BE PROGRAMMED TO AUTOMATICALLY
RELOAD THE DESIRED OPERATING CONSTANTS, OR SAFE VALUES FOR THE
PROCESS, UPON RETURN OF SYSTEM POWER. IN ANY EVENT, THESE SAFETY
FEATURES DO NOT ELIMINATE THE NEED TO PROVIDE EXTERNAL,
INDEPENDENT SAFETY DEVICES IN POTENTIALLY DANGEROUS OR UNSAFE
CONDITIONS.
ANAFAZE ALSO OFFERS ANASOFT, AN OPTIONAL SOFTWARE PROGRAM FOR
IBM PC COMPATIBLE COMPUTERS THAT WILL RELOAD THE 12LS WITH THE
CURRENT VALUES IN THE COMPUTER MEMORY UPON A RESET. THE USER
MUST INSURE THAT THIS WILL BE SAFE FOR THE PROCESS. AGAIN, USING
THIS FEATURE STILL DOES NOT ELIMINATE THE NEED FOR APPROPRIATE
EXTERNAL, INDEPENDENT SAFETY DEVICES.
PLEASE CONTACT ANAFAZE IMMEDIATELY IF THERE ARE ANY QUESTIONS
ABOUT SYSTEM SAFETY
iii
ANAFAZE 12LS
TABLE OF CONTENTS
1.0 INTRODUCTION..................................................................................................................1-1
2.0 SPECIFICATIONS ................................................................................................................2-1
2.1 Analog Inputs......................................................................................................................2-1
2.2 Control Capability...............................................................................................................2-2
2.3 Digital Outputs....................................................................................................................2-2
2.4 Digital Inputs.......................................................................................................................2-2
2.5 Serial Interface ....................................................................................................................2-2
2.6 Power Supply......................................................................................................................2-2
3.0 INSTALLATION ...................................................................................................................3-1
3.1 PHYSICAL CONSIDERATIONS.....................................................................................3-1
3.1.1 MOUNTING...............................................................................................................3-2
3.1.2 EXTERNAL WIRING .................................................................................................3-3
3.1.3 GENERAL WIRING REQUIREMENTS ....................................................................3-4
3.1.4 RECOMMENDED CABLES P/N ...............................................................................3-6
3.1.5 NOISE SUPPRESSION FOR DIGITAL OUTPUTS...................................................3-6
3.2 TERMINAL BLOCK AND CONNECTOR LAYOUT .....................................................3-7
3.3 ANALOG INPUTS...........................................................................................................3-10
3.3.1COMMON MODE VOLTAGE ..................................................................................3-10
3.3.2NORMAL MODE VOLTAGE ...................................................................................3-10
3.3.3GROUNDING .............................................................................................................3-10
3.3.4 SOURCE IMPEDANCE ...........................................................................................3-10
3.3.5 INPUT SCALING ......................................................................................................3-11
3.3.6 VOLTAGE INPUTS ..................................................................................................3-12
3.3.7MILLIAMP INPUTS...................................................................................................3-12
3.3.8THERMOCOUPLE INPUTS......................................................................................3-12
3.3.9RTD INPUTS ..............................................................................................................3-13
3.3.10 INFRARED NON-CONTACT TEMPERATURE SENSORS................................3-13
3.3.11 SCALING AND CALIBRATION............................................................................3-14
3.3.12 DIAGRAMS OF TYPICAL INPUTS ......................................................................3-14
3.4 CONTROL OUTPUTS.....................................................................................................3-14
3.4.1 PID CONTROL AND ALARM OUTPUTS CONNECTIONS.................................3-15
3.4.2 PID OUTPUT LIMITING ..........................................................................................3-15
3.5 COMPUTER SERIAL COMMUNICATIONS................................................................3-16
3.5.1 RS-232 CONNECTIONS...........................................................................................3-16
3.5.2 OTHER RS-232 LINES .............................................................................................3-16
3.5.3 RS-485 DESCRIPTION.............................................................................................3-17
4.0 FRONT PANEL OPERATION AND DISPLAYS................................................................4-1
4.1 FRONT PANEL KEYS ......................................................................................................4-3
4.2 DISPLAYS..........................................................................................................................4-4
4.2.1 BAR GRAPH DISPLAY..............................................................................................4-4
4.2.2 SINGLE LOOP DISPLAY...........................................................................................4-5
4.2.3 SCANNING DISPLAY................................................................................................4-6
4.2.4 ALARM DISPLAY ......................................................................................................4-7
4.3 GENERAL PROGRAMMING AND EDITING................................................................4-8
iv
4.4 OPERATIONAL MENUS..................................................................................................4-9
4.4.1 CHANGE SETPOINT..................................................................................................4-9
4.4.2 SET LOOP TO MANUAL/AUTO.............................................................................4-10
4.4.3 ADJUSTING OUTPUT LEVELS MANUALLY......................................................4-10
4.5 SETUP MENUS ...............................................................................................................4-11
4.5.1 SETUP GLOBAL PARAMETERS?..........................................................................4-13
4.5.2 SETUP LOOP INPUT................................................................................................4-19
4.5.3 SETUP LOOP CONTROL PARAMETERS .............................................................4-23
4.5.4 SETUP LOOP OUTPUTS..........................................................................................4-25
4.5.5 SETUP ALARMS ......................................................................................................4-28
4.5.6 MANUAL I/O TEST..................................................................................................4-32
4.6 RAMP AND SOAK OPTION ..........................................................................................4-34
4.6.1 DESCRIPTION ..........................................................................................................4-35
4.6.2 RAMP/SOAK FRONT PANEL DISPLAY ...............................................................4-37
4.6.3 PROFILE STATUS DISPLAY ..................................................................................4-38
4.6.4 PROFILE SELECTION MENU.................................................................................4-38
4.6.5 PROFILE TIME DISPLAY........................................................................................4-39
4.6.6 CYCLE COUNT DISPLAY.......................................................................................4-40
4.6.7 PROFILE OPERATION MENU................................................................................4-40
4.6.8 RESET PROFILE.......................................................................................................4-41
4.7 SETUP RAMP/SOAK PROFILE.....................................................................................4-45
4.7.1 SELECT A PROFILE FOR EDITING.......................................................................4-45
4.7.2 COPY ANOTHER PROFILE ....................................................................................4-47
4.7.3 EDIT TOLERANCE ALARM TIME ........................................................................4-47
4.7.4 EDIT READY SETPOINT.........................................................................................4-48
4.7.5 EDIT READY EVENT STATES...............................................................................4-49
4.7.6 EDIT EXTERNAL RESET........................................................................................4-50
4.7.7 EDIT SEGMENT NUMBER .....................................................................................4-50
4.7.8 EDIT SEGMENT TIME.............................................................................................4-51
4.7.9 EDIT SEGMENT SETPOINT ...................................................................................4-51
4.7.10 EDIT SEGMENT EVENTS.....................................................................................4-52
4.7.11 EDIT EVENT OUTPUT NUMBER ........................................................................4-52
4.7.12 EDIT EVENT OUTPUT STATE.............................................................................4-53
4.7.13 EDIT SEGMENT TRIGGERS.................................................................................4-54
5.0 PID CONTROL......................................................................................................................5-1
5.1 CONTROL MODES..........................................................................................................5-1
5.1.1 REVERSE-DIRECT ACTION....................................................................................5-1
5.1.2 HEAT/COOL DUAL OUTPUTS................................................................................5-1
5.1.3 CONTROL OUTPUTS ...............................................................................................5-1
5.1.4 DIGITAL OUTPUT ....................................................................................................5-1
5.1.5 DISTRIBUTED ZERO CROSSING...........................................................................5-2
5.2 TUNING PID LOOPS .......................................................................................................5-2
5.2.1 PROPORTIONAL CONTROL:..................................................................................5-2
5.2.2 PROPORTIONAL WITH INTEGRAL CONTROL:..................................................5-3
5.2.3 PROPORTIONAL W/ INTEGRAL W/ DERIVATIVE CONTROL: .........................5-3
5.2.4 OUTPUT DIGITAL FILTER: .....................................................................................5-3
5.2.5 PID TUNING CONSTANTS......................................................................................5-5
5.2.6 GENERAL PID CONSTANTS BY APPLICATION ..................................................5-6
v
6.0 SOFTWARE ..........................................................................................................................6-1
6.1 ANASOFT .........................................................................................................................6-1
6.2 CUSTOM APPLICATION PROGRAMS.........................................................................6-1
7.0 TROUBLE SHOOTING INFORMATION ...........................................................................7-1
7.1 Stand Alone Systems ..........................................................................................................7-1
7.1.1 Checking Control Outputs............................................................................................7-1
7.1.2 Checking Digital I/O.....................................................................................................7-1
7.2 Computer Supervised Systems............................................................................................7-1
7.2.1 Computer Problems ......................................................................................................7-2
7.2.2 Computer Software.......................................................................................................7-2
7.2.3 User Written Software ..................................................................................................7-2
7.2.4 ANASOFT....................................................................................................................7-2
7.2.5 Communications Problems...........................................................................................7-3
7.2.6 Serial Interface..............................................................................................................7-3
8.0 SOFTWARE COMMAND STRUCTURE............................................................................8-1
9.0 GLOSSARY OF TERMS ......................................................................................................9-1
vi
vii
1.0 INTRODUCTION
The ANAFAZE 12LS is a powerful 1/8th DIN controller that delivers 12 fully independent loops
of PID control. It functions as both a stand alone controller and as the key element in computer
supervised data acquisition and control systems. An LCD front panel display and a touch keypad
are available for local entry of control and other operating parameters. The ANAFAZE 12LS
can also be supervised by a computer or programmable controller through the standard serial
interface.
The ANAFAZE 12LS delivers critical flexibility needed for multiple loop industrial and other
control applications:
Direct Connection of Mixed Sensors: Versatile analog inputs allow direct connection of
most industrial sensors. Thermocouple inputs include reference junction compensation,
linearization, upscale break detection, and a choice of °F or °C display.
Automatic Scaling: All sensors can be automatically scaled by entering any two
measurement points. For example, to scale a pressure sensor, enter two points such as 28%
is 80 PSI, and 82% is 260 PSI. All subsequent readings, and entries such as setpoint and
alarms will be in PSI.
Selectable Control Outputs: Each digital control output can be selected as: on/off, time
proportioning, or distributed zero crossing. Each loop can be independently set for on/off,
P, PI, or PID control with reverse acting [heat] or direct acting [cool] output.
Alarms -- Complete Process Monitoring: For process monitoring a unique alarm
capability is included. A deviation band alarm, and high and low process [fixed] alarms
can be independently set for each loop. In addition to global annunciator digital output,
each alarm can include a single or grouped digital output. For example, the digital output
from all the high process alarms can be directed to a single output for automatic process
shutdown.
Front Panel or Computer Operation: Controller operation and setup is possible from
the front panel or from a local or remote computer. ANAFAZE offers ANASOFT, an IBM
PC or compatible, menu driven program to set the ANAFAZE 12LS parameters. In
addition, ANASOFT features graphic trend plotting, process overviews, printouts, and data
archiving in LOTUS compatible files.
Multiple Job Storage: Up to 8 jobs can be stored in protected memory and selected with
a single entry. Each job is a set of operating conditions, including setpoints and alarms.
Thus if a single oven is producing multiple products, entry of the job number will setup all
the loops. Dual Output Standard: The ANAFAZE 12LS includes dual control outputs
for each loop with a second set of control constants for heat/cool applications.
Optional Ramp and Soak: The ANAFAZE 12LS is also available with a built in
powerful ramp and soak programmer for batch processing.
Intelligent Front Panel Delivers Convenient Operation
1-1
The ANAFAZE 12LS front panel provides an intelligent method for both viewing the process
conditions and operating the controller. Displays show information in increasing detail: bar graph
summary, single loop displays, and detailed guided setup menus. For operating security, all front
panel entries can be password protected with two levels. With the panel "unlocked" common
operator changes, such as setpoint or manual/auto, are made easier with single dedicated keys.
Detailed setup requires a password, and entries are made on guided menus. The result is a
controller that is both easy and logical to use.
The front panel features a two line alphanumeric LCD display. Different process displays are
quickly selected with the front panel push-buttons:
Bar Graph Display: Provides a system overview by displaying a deviation bar graph for
each loop. Loop status including acknowledged alarms, manual or auto are also displayed.
Single Loop Display: Highlights the detailed status for any selected loop including the
process variable, engineering units, the setpoint, any alarms, and the control output
percentage.
Scanning Display: The scanning display sequentially shows the single loop display for all
the loops.
Alarm Display: If an alarm occurs, the front panel switches to the alarm display which is
the single loop display with the alarm condition flashing. Pressing ALARM ACK stops
the flashing and allows the display to be switched to any function.
1-2
Guided Menus Simplify Setup
The ANAFAZE 12LS directs operator and supervisor changes with guided menus. Two levels are
provided: one for operator changes and one for supervisor controller setup.
Operator Changes: Single dedicated keys are used to make process changes from the
single loop display. The setpoint can be changed, the loop can be set to auto or manual,
and ramp and soak loops can be started, held, or stopped. If the loop is set to manual, the
percent output can be changed. These changes can be locked out from the supervisor
menus if desired.
Supervisor Setup: Detailed editing is done by pressing a special sequence of keys to enter
the setup menus. The supervisor is guided through a list of functions to change:
Global? This is used to save and restore jobs, define action on power up,
communications address and baud rate, communications error checking, panel lock,
and alarm delay.
Inputs? Input sensor type, engineering units, scaling, and sample time for pulse
inputs.
Control? The loop control constants including: Proportional gain [P], Integral or
reset [I], and derivative or rate [D], and a digital output filter. For the dual outputs,
a second gain, reset, rate, filter and spread can be entered for the second output.
Output? Selects the control output including: analog, on/off, cycle time
proportioning, distributed zero crossing, and reverse [heat] or direct [cool] action.
The heat output can be directed to the terminals or ribbon connector.
Alarms? Independent deviation alarm band, high process, and low process alarms
can be set for each loop. Each alarm can be set to activate any of the digital outputs
on alarm. A deadband can be entered for each loop.
Ramp/Soak? If this option is installed up to eight, 20 segment ramp and soak
profiles can be defined.
I/O Test? This is used to check the state of the digital inputs and outputs.
1-3
Digital Inputs and Outputs Expand Versatility
Digital inputs and outputs are provided to further enhance the ANAFAZE 12LS flexibility. Digital
outputs are provided for global alarms, systems status, individual high and low alarms, and ramp
and soak events. Digital inputs are available to control the ANAFAZE 12LS in response to
external conditions.
Annunciator Alarm Output: One of the digital outputs is setup as a global output for
connection to an annunciator. This output is turned on when any alarm occurs. The output
will be turned off when the operator acknowledges the alarm from the computer or the
front panel. New alarms will cause the output to be turned on again.
Digital Outputs: 9 digital outputs can be assigned through the front panel or the computer
as alarms or as ramp and soak events. The same output can be used by more than one
alarm or event. This allows alarms to be grouped as needed. For example output 1 could
be set to respond to a high alarm on loops 2, 4, 7, and 8 or any other combination.
Digital Inputs: 8 digital inputs can be assigned as triggers for controller functions. These
would be used to change setpoint in response to an external event or as hold/continue
inputs for ramp and soak profiles.
Ramp, Soak, and Batch Control
The ANAFAZE 12LS ramp and soak version delivers powerful batch control. Independent ramp
and soak profiles can be assigned to any or all loops. Up to 12 profiles, one for each loop, can be
stored in non-volatile memory. Each profile can have up to 20 segments with digital inputs for
triggers, digital outputs for events, assured soak limits, and unlimited repeats. The profiles can be
started, stopped, held or continued from the front panel, the computer, or through the digital
inputs. Up to 9 digital outputs can be used as events and included in any profile.
1-4
2.0 SPECIFICATIONS
2.1 Analog Inputs
Analog Inputs 12, Solid state, common ground.
Isolation: Between inputs and ground: 10volts peak.
A/D Converter: Integrating voltage to frequency.
Range: -10 to 60mv, can be changed with scaling resistors to any range
from 0 up to 25v.
Resolution: 0.02%, greater than 12 bits.
Accuracy: 0.1% at 25°C
Calibration: Automatic zero and full scale.
Temperature Coef: Less than 100ppm/°C, 0.01%/°C.
Normal Mode Rejection: 60db at 60Hz, full scale range maximum.
Loop Update Time: 1 time per second, every input.
Thermocouple Inputs: J, K, T, B, S, and R. Measurement Ranges:
J -350 to 1500 B 150 to 3200
K -450 to 2700 S 0 to 3200
T -300 to 800 R 0 to 3210
T/C Break: Pulse type for up scale break.
Milliamp Inputs: 4-20ma, 10-50ma, 0-50ma, etc. with scaling resistors.
Infrared Inputs: Power supply included, withscaling resistors.
Source Impedance: Measurements are within specification with up to 500 ohms source
resistance.
2-1
2.2 Control Capability
Number of Loops: 12, Dual Output.
Control Outputs: Cycle Time Proportioning, Distributed Zero Crossing, or On/Off;
all independently selectable for each loop.
Control Action: Reverse [heat] or Direct [cool], independently selectable for each
loop.
Digital Control Outputs: Nominal 5vdc at 10ma to driveoptically- isolated solid-state relays.
Cycle Time: Programmable foreach loop, 1-255 secs.
Output Resolution: 16 bits.
2.3 Digital Outputs
Number: 11
Configuration: 1 Global Alarm
9 for alarms or events.
1 not used standard PROM
2.4 Digital Inputs
Number: 9
Configuration: 8 for triggers
1 not used standard PROM
2.5 Serial Interface
Type: RS-232 or RS-485 4 wire, factory select
Isolation: RS-232: None.
RS-485: To RS-485 Specification.
Baud Rate: 2400 or 9600, menu selectable.
Protocol: Form of ANSI X3.28-1976, Compatible with Allen-Bradley PLC,
Half Duplex.
Error Check: BCC or CRC, menu selectable.
Number of Controllers: Each communications line: 32 with RS- 485, 1 with RS-232.
2.6 Power Supply
2-2
Power input: 10 to 30VDC, 3 Watts typical, 110VAC adapter provided.
2-3
3.0 INSTALLATION
There are some precautions that must be observed when installing ANAFAZE 12LS.
WARNING! -- ELECTRICAL SHOCK DANGER
It is very important that all system power including
the power input be disconnected before servicing the
ANAFAZE 12LS. HIGH VOLTAGE MAY BE PRESENT EVEN WHEN
POWER IS TURNED OFF! To reduce the danger of elec trical shock always mount the 12LS in an enclosure
that prevents personal contact.
Although the ANAFAZE 12LS makes measurements of input signals that are referenced to
ground, the 12LS ground and other signal lines can inadvertently have power line or other high
voltage present even if the input power is turned off. This is possible, for example, if a
thermocouple was shorted to the AC power line.
WARNING!
USE CORRECT INSULATION TRIM LENGTH AND WIRE GAUGE
The correct insulation trim length is 1/4" or 5 mm.
Care must be taken to prevent contact between wires
and the case, which is grounded. The terminal
manufacturer has UL approval for #14 to #30 (AWG).
ANAFAZE recommends using #18 or #20 AWG.
To effectively use the terminals, the wire insulation should be trimmed so that the wire fits inside
the terminal with no bare wire exposed. Stranded wire should be tinned.
WARNING! -- SUPPORT CABLES
Power, input and output cables should be supported
to reduce strain on the terminals and to prevent
wires from being pulled out.
WARNING! -- PROVIDE CLEARANCE FOR VENTILATION
Always install the 12LS such that the slots in the
housing will have unrestricted air flow. Do not
block the slots with other equipment. If temporary
covers are placed over the 12LS during wiring ensure
they are removed prior to operation.
3.1 PHYSICAL CONSIDERATIONS
The ANAFAZE 12LS consists of a 1/8th DIN housing with a front plug in electronics module.
3-1
3.1.1 MOUNTING
For optimum performance when directly connecting thermocouple inputs the unit should be
protected from thermal shocks whenever possible. This will minimize any temperature gradients
across the terminal strips and ensure the highest accuracy.
The required panel cutout is a rectangular hole 46mm x 92mm [1.81in x 3.63in]. This should be
carefully cut since the 1/8th DIN specification only allows a front panel of 48mm x 96mm [3.78in
x 3.78in] -- so there is not a lot of room for error.
After the hole is cut the ANAFAZE 12LS is inserted through the front of the panel and the top and
bottom clamps are screwed into place. If excessive vibration is anticipated a rear support may be
required both for the 12LS and the interconnecting cables.
Mounting Hole Dimensions
|-----------------------3.63+.05"----------------------------¦
----- |---------------------------------------------------------------|
¦ ¦ ¦
¦ | ¦
1.81+.05" ¦ ¦
¦ ¦ ¦
¦ ¦ ¦
¦ ¦ ¦
----- |---------------------------------------------------------------|
Dimensions are in inches.
3-2
1/8th DIN HOUSING
3-3
3.1.2 EXTERNAL WIRING
During wiring, it is recommended that the 12LS electronics be removed or temporary covers be put over the housing
slots to ensure pieces of wire do not enter the housing and lodge in the electronics. Always ensure that the housing is
clean when the electronics is plugged in.
The successful installation of the ANAFAZE 12LS control system will be the result of selecting the proper equipment
and the use of correct installation techniques with appropriate material. One area of concern is the wiring type and
placement of the wiring.
The wiring is selected as to the function of the wire, the installation requirements, and the possible
mechanicalelectrical problems that may occur.
The function of the wire is divided into two basic categories: INPUTS and OUTPUTS. The process control
requirements will dictate the TYPE of INPUTS and the TYPE of OUTPUTS along with the mechanical electrical
requirements of the individual installation.
As defined by ANAFAZE, the term AC power is applied to the 120 VAC control supply. High power is applied to 240
VAC or higher, primarily used for control loads.
3.1.3 GENERAL WIRING REQUIREMENTS
1. Use stranded wire. Solid wire is recommended for fixed service and tend to make intermittent connections when
moving the field wiring around for maintenance.
2. Use 18 or 20 ga. size wire. The use of 16,18,20,22, or 24 ga.is permissible also. The power requirement is not a
factor in the wire size. Only the mechanical strength and the ohmage of the wire may be factors to consider.
Smaller or larger sizes are not easily installed, may be easily broken and/or cause intermittent connections.
3. Use shielded wire. The electrical shield is used primarily to protect from unwanted electrical noise.
Normal use of the INPUT WIRING SHIELD is to connect one end only to the 120 VAC panel ground at the 12LS
panel location.
Normal use of the OUTPUT WIRING SHIELD would be to connect one end only to the 120 VAC panel
ground in the panel that the 12LS is mounted in. Actual use of the shields will be determined by the
installation requirement.
For additional noise suppression measures see NOISE SUPPRESSION FOR Digital Outputs.
3-4
4.
Use Thermocouple Extension Wire for all thermocouple (T/C) inputs.
unshielded. When using such, the shield function cannot be utilized and only 16, 18, or 20 ga should be
used.
Install all T/C wiring in its own conduit away from AC Power and High Power wiring.
Depending on type and wire size up to 400-500 feet in length may be used to be within stated accuracy and
source impedance.
5.
Use multiconductor stranded shielded cable for analog inputs.
Most inputs will use a shielded twisted pair, but some may require a 3 wire input.
its own conduit away from AC Power and High Power wiring.
Wire sizes of 20, 22, or 24 ga. may be used.
Most T/C Ext. Wire is solid wire
Run all analog input wiring in
6.
Use multiconductor stranded shielded cable for analog outputs and PID digital outputs
mount SSR's. The analog output will normally use a twisted pair while the digital outputs will be up to 9 or 20
conductors depending on wiring techniques. All cables will be shielded. The wiring size will normally be 24
ga.
The maximum length for the digital outputs should not exceed 25 feet. The maximum length for the
analog outputs should not exceed 400 feet. All wiring must be in a separate conduit away from AC
Power and High Power wiring.
When using the 50 conductor flat ribbon cable for the I/O, use of the 50-pin connector is recommended for both ends
of the cable. The wire is too small to withstand much flexing when connected to a screw terminal.
length should not exceed 15 feet.
7. When installing communications wiring, by pulling in an extra pair, a sound power phone system could be utilized
for communications between the ANAFAZE controllers and the computer. This could be used for
maintenance, checking calibration and many other functions. A David Clark #H5030 sound powered system
has been used successfully in systems requiring this function.
8.
When installing any I/O wiring to the ANAFAZE controllers inside a panel, it should never be run in the
same bundle as AC power wiring.
Also wiring bundles of low power ANAFAZE circuits next to bundles of high power AC wiring should never
be done.
prime importance. In fact most AC voltage high power circuits are installed in a separate panel.
The physical separation of the high power circuits from the ANAFAZE controllers should be of
connected to panel
The cable
3-5
3.1.4 RECOMMENDED CABLES P/N
Use these cables or equivalent.
|--------------------------------------------------------------|
¦ FUNCTION ¦ MFR P/N ¦ # of WIRE ¦
|--------------------------------------------------------------¦
¦ Analog Inputs ¦ Belden #9154 ¦ 2-20ga ¦
¦ ¦ Belden #8451 ¦ 2-22ga ¦
¦ ¦ ¦ ¦
¦ RTD Inputs ¦ Belden #8772 ¦ 3-20ga ¦
¦ ¦ Belden #9770 ¦ 3-22ga ¦
¦ ¦ ¦ ¦
¦ T/C Inputs ¦ T/C EXT.WIRE ¦ 2-wire ¦
¦ ¦ ¦ ¦
¦ Carbon Probe Input ¦ Belden #88760 ¦ 2-18ga ¦
¦ ¦ ¦ ¦
¦ ¦ ¦ ¦
¦ Digital PID Outputs ¦ Belden #9539 ¦ 9-24ga ¦
¦ and Digital I/O ¦ Belden #9542 ¦ 20-24ga ¦
¦ ¦ Ribbon Cable ¦ 50-wire ¦
¦ ¦ ¦ ¦
¦ Analog Outputs ¦ Belden #9154 ¦ 2-20ga ¦
¦ ¦ Belden #8451 ¦ 2-22ga ¦
¦ ¦ ¦ ¦
¦ Computer Communication ¦ Belden #9729 ¦ 4-24ga ¦
¦ --RS232,RS422,RS485, ¦ Belden #9730 ¦ 6-24ga ¦
¦ or 20ma-- ¦ Belden #9842 ¦ 4-24ga ¦
¦ ¦ Belden #9843 ¦ 6-24ga ¦
|--------------------------------------------------------------|
3.1.5 NOISE SUPPRESSION FOR DIGITAL OUTPUTS
When using the digital outputs from ANAFAZE multiloop controllers to energize dry contact electrical- mechanical
relays with inductive loads, generation of RFI may become a problem.
This problem may cause the display on the 8LS to blank out and then re-energize as if power had been momentary
turned off. It may also cause the CPU in the equipment to reset, thus losing the PID output levels. It may also damage
the digital output IC circuit, thus not being to energize the digital outputs. If, the IC circuit is damaged, factory repair
will be required.
The type of loads that may cause a problem are motor starters, alarm horns, etc. The RFI is generated upon opening of
the metallic relay contacts.
To correct the problem of RFI noise problems:
1. Use Solid State Relays (SSR) wherever possible in place of electrical-mechanical relays (E-M relays).
2. When using E-M relays, if possible do not mount them in the same panel as the ANAFAZE equipment.
3-6
3. Separate the 120 vac power leads from the low level input and outputs leads from the ANAFAZE. Do not run the
digital outputs or PID control outputs leads in the same wire bundle as any 120 vac wires. Inputs leads should never be
run in the same bundle with any high power leads. See 3.3.3.
4. If, E-M relays are required and must be in the same panel as the ANAFAZE equipment, use a .01 uF at 1000 vdc or
higher vdc disk capacitor in series with a 47 ohm 1/2 W resistor across the NO contacts of the relay load contacts. This
is the most important step in suppressing RFI from relay contacts. This network is known as arc suppresser or snubber
networks.
5. Use of other voltage suppressing devices may also be used, but are not normally required. A device known as a
MOV rated at 130 vac for 120 vac control circuits may be placed across the load. This will limit the peak ac voltage to
about 180 vac. A device known as a transorb (back to back zeners) may be used across the digital output. The rating of
5 vdc should be used. This will limit the dc voltage to 5 vdc on the digital output loop.
See diagrams for proper placement of the above devices. The parts for RFI suppression are available from ANAFAZE.
The above steps should eliminate any noise problems that might be present with using E-M relays. If, problems
persists and/or any questions about the above steps arises, please call ANAFAZE.
DIAGRAM OF TYPICAL DIGITAL OUTPUTS WITH RFI SUPPRESSION
3-7
3.2 TERMINAL BLOCK AND CONNECTOR LAYOUT
The ANAFAZE 12LS terminal blocks and connectors are assigned according to the following two pages. Subsequent
sections provide detailed connection descriptions.
12LS REAR PANEL
NOTES:
1. THE CH (LOOP NUMBER) +IN IS THE ANALOG POSITIVE OF THE INPUT SIGNAL FOR THAT LOOP.
2. -IN COM IS THE ANALOG COMMON NEGATIVE OF THE INPUT SIGNAL.
3. CTRL COM IS THE COMMON FOR THE DIGITAL I/O CIRCUITS, SERIAL COMMUNICATIONS, AND IS
CONNECTED TO THE NEGATIVE OF THE POWER SUPPLY.
4. THE COMMUNICATIONS SELECTION OF RS-232 OR RS-485 WILL DETERMINE THE FUNCTION OF
TERMINALS #23 AND #24. SEE SECTION 3.5.1 RS-232 CONNECTIONS AND SECTION 3.5.3.3 RS-485
CONNECTIONS.
5. TERMINAL #24 WILL SUPPLY +5VDC FOR THE SOURCE TO OPERATE THE GLOBAL ALARM AND
DIGITAL OUTPUTS WHEN USED WITH RS-232 COMMUNICATIONS.
6. DIGITAL OUTPUTS #8 AND #9 ARE DUPLICATED ON TERMINAL #19 AND #20 RESPECTIVELY AS
WELL AS THE RTB TERMINALS OF #14 AND #12.
3-8
The remote terminal block (RTB) provides the control outputs and additional digital inputs and outputs as follows:
|------------------------------------------------------------|
¦ FUNCTION ¦ TERMINAL ¦ FUNCTION ¦
|------------------------------------------------------------¦
¦ +5VDC ¦ 1 ¦ 2 ¦ +5VDC ¦
¦ CTRL COM ¦ 3 ¦ 4 ¦ CTRL COM ¦
¦SPARE ¦ 5 ¦ 6 ¦ SPARE ¦
¦SPARE ¦ 7 ¦ 8 | BOX SELECTED ¦
¦ PIDHEAT 1 ¦ 9 ¦ 10 ¦ GLOBAL ALARM ¦
¦ PIDHEAT 2 ¦ 11 ¦ 12 ¦ DIG OUTPUT 9 ¦
¦ PIDHEAT 3 ¦ 13 ¦ 14 ¦ DIG OUTPUT 8 ¦
¦ PIDHEAT 4 ¦ 15 ¦ 16 ¦ DIG OUTPUT 7 ¦
¦ PIDHEAT 5 ¦ 17 ¦ 18 ¦ DIG OUTPUT 6 ¦
¦ PIDHEAT 6 ¦ 19 ¦ 20 ¦ DIG OUTPUT 5 ¦
¦ PID HEAT 7 ¦ 21 ¦ 22 ¦ DIG OUTPUT 4 ¦
¦ PIDHEAT 8 ¦ 23 ¦ 24 ¦ DIG OUTPUT 3 ¦
¦ PIDHEAT 9 ¦ 25 ¦ 26 ¦ DIG OUTPUT 2 ¦
¦ PIDHEAT 10 ¦ 27 ¦ 28 ¦ DIG OUTPUT 1 ¦
¦ PIDHEAT 11 ¦ 29 ¦ 30 ¦ PID COOL 12 ¦
¦ PIDHEAT 12 ¦ 31 ¦ 32 ¦ PID COOL 11 ¦
¦ PIDCOOL 1 ¦ 33 ¦ 34 ¦ PID COOL 10 ¦
¦ PIDCOOL 2 ¦ 35 ¦ 36 ¦ PID COOL 9 ¦
¦ PIDCOOL 3 ¦ 37 ¦ 38 ¦ PID COOL 8 ¦
¦ PIDCOOL 4 ¦ 39 ¦ 40 ¦ PID COOL 7 ¦
¦ PID COOL 5 ¦ 41 ¦ 42 ¦ PID COOL 6 ¦
¦ DIG INPUT 1 ¦ 43 ¦ 44 ¦ DIG INPUT 2 ¦
¦ DIG INPUT 3 ¦ 45 ¦ 46 ¦ DIG INPUT 4 ¦
¦ DIG INPUT 5 ¦ 47 ¦ 48 ¦ DIG INPUT 6 ¦
¦ DIG INPUT 7 ¦ 49 ¦ 50 ¦ DIG INPUT 8 ¦
|------------------------------------------------------------|
REMOTE TERMINAL BLOCK CONNECTIONS
All digital outputs and PID outputs on this flat ribbon connection are SINK OUTPUTS. They are in reference
to the 5Vdc supply. The outputs will be low when they are ON.
All digital inputs are TTL level inputs and may be selected from software if they will be high/false or low/true
inputs. The inputs are in reference to CTRL COM.
NOTE! WHEN USING THE RTB, PROPER POLARITY OF THE FLAT RIBBON CABLE IS
NECESSARY FOR CORRECT PIN TERMINATIONS. INSTALL THE RED MARKER INDICATING
PIN #1 TO THE LEFT WHEN TERMINAL #1 OF THE RTB IS TO THE LEFT. THE FLAT RIBBON
CABLE SHOULD HAVE THE RED MARKER TO THE LEFT WHEN IT IS INSTALLED ON THE
REAR OF THE 12LS. TO CONFIRM PROPER POLARITY, CHECK THAT PIN #1 IS +5VDC WITH
RESPECT TO PIN #3.
WARNING
3-9
3.3 ANALOG INPUTS
Connecting analog signals to the ANAFAZE 12LS is normally straightforward. Most thermocouples can be directly
connected and mixed in any order. Other types of analog signals such as mAdc or Vdc require scaling resistors
installed on the 12LS inputs. However, some problems may occur that could reduce accuracy and possibly damage the
unit. Sections 3.1 through 3.4 indicate some of the potential areas for concern. [See typical input DIAGRAM in
section 3.13].
3.3.1COMMON MODE VOLTAGE
Common mode voltage is the voltage between the ground at the sensor and the ground at the ANAFAZE 12LS. It can
be an AC or DC voltage and appears equally at the high and low input terminals. Frequently it is caused by large
currents flowing in the ground path between the 12LS and the sensors. The effects are minimized by using isolated
sensors or ungrounded thermocouples. Since the 12LS uses common ground inputs, if grounded sensors are used, any
common mode voltage will cause current flow in the sensor leads and reading errors.
3.3.2NORMAL MODE VOLTAGE
Normal mode voltage appears across the terminals of the input and is the signal from the sensor plus any undesirable
noise. The major cause of this noise is AC power line pick-up. The effects are reduced by the ANAFAZE 12LS
capacity to integrate the signal over a multiple of the power line frequency. Further reduction can be achieved by
locating the 12LS near the sensors and by using twisted and shielded sensor wires. To ensure accurate readings, the
maximum of normal mode plus signal should not exceed -10mv to +60mv.
3.3.3GROUNDING
For best accuracy, observe the grounding recommendations for connecting each input and output signal. The analog
signal grounds should be connected to the analog ground terminals. The communication and control outputs should
be connected to their respective grounds. Do not mix the grounds or connect them together. If possible, route the
analog signal cables separately from the communication, control and power cables.
3.3.4 SOURCE IMPEDANCE
Each sensor has a certain output impedance which is effectively connected across the ANAFAZE 12LS input amplifier
when a measurement is made. To reach the rated accuracy, the maximum source impedance should not exceed 500
ohms. Consult ANAFAZE for operation with higher source impedance.
3-10
3.3.5 INPUT SCALING
The ANAFAZE 12LS contains an area that can be used to install resistors to scale input voltages and convert milliamp
inputs to match the -10 to 60mv (-16.7% to 100%) input range. The input circuit is designed to enable connection of
current inputs (such as 4 to 20ma), and voltage inputs. ANAFAZE will supply input scaling as needed -- order option
12LS-SI-XX. The input circuit is shown below:
The location of RA and RB for each input is shown on the following table:
RA
is shorted by a jumper on the PC board, remove this jumper to install RA.
Resistors should be 0.1% metal film, 1/4 watt. Note that the resistors must be stood on end due to the compact size of
the unit. Other components such as capacitors can be installed for signal conditioning. Please consult ANAFAZE.
The PC board silk screen shows the resistor locations.
3-11
3.3.6 VOLTAGE INPUTS
DC Voltage inputs should be connected with the positive side to the CH +IN terminal and the negative side to one of
the -IN COM terminal. The input range is -10 to +60 mv. Signals greater than 60 mv must be scaled with resistors to
match the input full scale to 60 mv. The scaling resistor RA is selected as the voltage dropping and/or current limiting
resistor. RB is selected for the 60 mv full scale dropping resistor. It should normally be less then 500 _ and should
never be greater then 1000 _. Any value above 1000 _ for RB will cause error due to the upscale burnout circuit.
|------------------------------------------------------------------|
¦ TABLE 3-1. TYPICAL STANDARD VALUE SCALING RESISTOR ¦
|------------------------------------------------------------------¦
¦ Output Voltage Range ¦ RA ¦ RB ¦ Accuracy ¦
+------------------------¦----------¦----------¦-------------------¦
¦ 0 - 100 mV ¦ 499 Ω ¦ 750 Ω ¦ + .1 % ¦
¦ 0 - 500 mV ¦5.49 KΩ ¦ 750 Ω ¦ + .1 % ¦
¦ 0 - 1 V ¦6.91 KΩ ¦ 442 Ω ¦ + .2 % ¦
¦ 0 - 5 V ¦39.2 KΩ ¦ 475 Ω ¦ - .2 % ¦
¦ 0 - 10 V ¦49.9 KΩ ¦ 301 Ω ¦ - .1 % ¦
|------------------------------------------------------------------|+
The above values are standard metal film values and will give an accuracy of +0.25% when using .1% tolerance
resistors. Any possible error due to resistor tolerance may be corrected by using the built in linear scaling.
3.3.7MILLIAMP INPUTS
Current inputs from transmitters are accommodated by placing resistors in the input section to convert the current input
into a voltage. The input connections are the same as the voltage inputs. Different current input ranges are
accommodated by selecting the proper resistor values.
A single 0.1% resistor is used as follows:
4 to 20 ma 0 to 10 ma
RB = 3.000 Ω RB = 6.000
Ω
3.3.8THERMOCOUPLE INPUTS
All thermocouple types may be directly connected to the ANAFAZE 12LS. Types J,K,T,R, S and B linearization
and cold junction compensation are provided standard in the ANAFAZE 12LS. For other thermocouple types, optional
input ranges are required. Thermocouples should be connected with the positive lead to the CH +IN terminal and the
negative lead to one of the -IN COM analog grounds.
Use 20 gage or smaller T/C Extension wire as there are only four terminals for the common negative input lead for 12
loops.
3-12
Use of the grounded T/C, meaning that the T/C junction is at the same potential of the metal protection sheath of the
T/C assembly, may cause calibration shifts and/or erratic temperature readings of the input. The use of a grounded T/C
in a process using electrical energy for heating, may also cause damage to the 12LS.
The ungrounded T/C, meaning that the T/C junction is electrically isolated from the metal sheath of the T/C assembly
is recommended by ANAFAZE for use as the type of T/C to be use with the 12LS.
When updating an existing temperature control system with the ANAFAZE 12LS, it is highly recommended that all
grounded T/C in use with the old system be changed to ungrounded types of T/C.
WARNING
3.3.9RTD INPUTS
RTD's should have external signal conditioning with an isolated 4-20ma output or the equivalent for connection to the
12LS. Please consult ANAFAZE for additional information.
3.3.10 INFRARED NON-CONTACT TEMPERATURE SENSORS
The ANAFAZE IRSM (infrared sensing module) is ideally suited for many infrared non-contact temperature
applications. It can be supplied by ANAFAZE as a fully integrated system with the 12LS configured to provide
power for up to four IRSM modules and for direct connection of the IRSM output. The following connections are
required if the IRSM internal ambient sensor is not used:
+--------------------------------------------------------------+
¦ TABLE 3-2. IRSM CONNECTIONS ¦
+--------------------------------------------------------------¦
¦ 12LS ¦ IRSM Wires ¦
¦ TB1 +------------------------------------------------¦
¦ TERMINALS ¦ Pin Nr. ¦ Color ¦ Function ¦
+-------------¦----------¦---------¦---------------------------¦
¦ CH # +IN ¦ A ¦ Orange ¦ Signal Out (0-10 madc) ¦
¦ -IN COM ¦ B ¦ White ¦ Signal Ground ¦
¦ -IN COM ¦ K ¦ ¦ Shield ¦
¦ +5VDC ¦ E ¦ Red ¦ +5 VDC Supply ¦
¦ CTRL COM ¦ C ¦ Black ¦ Power Ground ¦
¦ CTRL COM ¦ J ¦ Brown ¦ No Peak Hold ¦
¦ N/C ¦ D ¦ Green ¦ +15 VDC Supply ¦
¦ N/C ¦ F ¦ Blue ¦ Ambient Sensor ¦
¦ N/C ¦ H ¦ Yellow ¦ Track and Hold ¦
+--------------------------------------------------------------+
The range of the standard ANAFAZE IRSM is 0-1000o F with an output of 0-10mAdc. The input of the ANAFAZE
12LS must be configured for a 0-10madc input. See section 3.3.7
To use more than four IRSM's with the 12LS, use an external power supply of 8-15vdc.
3-13
If desired, a second input may be used to monitor the internal IRSM ambient temperature. Consult ANAFAZE for
more information.
3.3.11 SCALING AND CALIBRATION
The ANAFAZE 12LS includes a scaling provision to convert analog inputs into engineering units. Section 4.5.2.3
describes how to set the automatic scaling.
3.3.12 DIAGRAMS OF TYPICAL INPUTS
CH # +IN O--- White -------------------------- Type J T/C
-IN COM O--- Red --------------------------- UNGROUNDED
Earth GND O-- T/C Wire Shield if used------
CH # +IN O--- Yellow -------------------------
-IN COM O--- Red --------------------------- Type K T/C
Earth GND O-- T/C Wire Shield if used------ UNGROUNDED
CH # +IN O------------------------------------ 4-20mAdc/
-IN COM O------------------------------------ Voltage
Earth GND O-- Shielded wiring recommended-----
3.4 CONTROL OUTPUTS
+-----------------------------------------------------+
¦ WARNING! -- GROUND LOOP POTENTIAL ¦
+-----------------------------------------------------¦
¦ The ground of every control output is connected to ¦
¦the ANAFAZE 12LS logic ground. Use caution when ¦
¦connecting external devices that may have their low ¦
¦ side at voltage other than controller ground, since ¦
¦ potential ground loops can be created. Use isolated ¦
¦ relays or the isolated control device inputs if ¦
¦ possible grounding problems are expected. ¦
+-----------------------------------------------------+
The ANAFAZE 12LS includes two sets of control outputs for each loop. These are provided on the 50 pin ribbon
cable connector and are set for heat/cool whether or not they will be used for each application.
1. Each output may be individually programmed as a different type (on/off, CTP, or DZC.).
2. Each output can be individually programmed to be direct or reverse acting [both outputs can be the same].
3. There may be a deadband programmed for heat/cool, and within that deadband both outputs will be off.
3-14
3.4.1 PID CONTROL AND ALARM OUTPUTS CONNECTIONS
Typical digital control outputs utilize external optically- isolated solid-state relays. These relays use a 3 to 32vdc input
for control and can be sized to switch up to 100 amps at 480vac. For larger currents these relays can be used to drive
contactors.
|-----------------------------------------------------|
¦ NOTE: Control outputs are SINK OUTPUTS. They will be¦
¦low when the output is ON. They should be connected ¦
¦to the minus (-) side of SSRs. ¦
|-----------------------------------------------------|
Example of Heat/Cool And Alarm Outputs Connections:
SSR 1 SSR 2 SSR 3
|------| |------| |------|
RTB TERMINALS PIN ¦ - + ¦ ¦ - + ¦ ¦ - + ¦
|------| |------| |------|
PID HEAT 1 9 ||-------| ¦ ¦ ¦ ¦ ¦
¦ ¦ ¦ ¦ ¦
PID COOL 1 33 ||----------¦---------| ¦ ¦ ¦
¦ ¦ ¦ ¦
+5VDC 1 ||----------|------------|---------¦--|
¦
DIG OUTPUT 1 28 ||---------------------------------|
3.4.2 PID OUTPUT LIMITING
The output from each loop's dual heat/cool output may be limited to a value less than 100%. This level may not be
exceeded by the PID control action. This limit on the control output may be limited by a period of time and than
returned to full 100% output or it may be a continuous limit until changed by the programming keys.
The limit time delay is restarted whenever:
a) A new time period is entered.
b) A loop is switched from MANUAL to AUTO mode.
c) The controller is restarted(powered up).
The time period is adjustable from 1 to 999 seconds for a maximum period of time of over 16 minutes. A time of 0
seconds will be displayed as C, the same as for Continuous.
The Output Limiting is disabled by setting the value to 100%. The control mode of ON/OFF has no output limiting
available.
The output limiting may be used for "Soft Start" type of requirements of different processes. May also be used to
restrict the energy into a process, thus tailoring the controller output to the process requirements.
3-15
3.5 COMPUTER SERIAL COMMUNICATIONS
The ANAFAZE 12LS offers two types of serial communications: RS- 232 and RS-485. The RS-232 is used primarily
for local communications of up to the recommended RS-232 distance of 50 feet. It can only be used with one
ANAFAZE 12LS. More than one unit requires RS-485
The RS-485 is a voltage balanced, 4-wire, long distance, multi- point transmission interface. Up to 32 addresses can be
set in the 12LS for one communication line.
Units must be ordered for the RS-485 communications, otherwise the factory standard of RS-232 will be supplied with
the ANAFAZE 12LS.
3.5.1 RS-232 CONNECTIONS
The optically-isolated RS-232 interface is connected using the Communications terminal block 1. See
connections.
|--------------------------------------------------------------|
¦ TABLE 3-3. RS-232 CONNECTIONS ¦
|--------------------------------------------------------------¦
¦ Computer Connector ¦ 12 LS ¦
|------------------------------¦ TB 1 Pin Nr. ¦
¦ DB 25 ¦ DB 9 ¦ ¦
|--------------¦---------------¦-------------------------------¦
¦ RX Pin 3 ¦ RX Pin 2 ¦ TX Pin 26 ¦
¦ TX Pin 2 ¦ TX Pin 3 ¦ RX Pin 25 ¦
¦ GND Pin 7 ¦ GND Pin 5 ¦ GND Pin 23 ¦
|--------------------------------------------------------------|
The computer pins are for the normal 25 pin RS-232 connector [DB25] and the normal 9 pin connector [DB9]. On
some computers transmit TX and receive RX may be reversed. Please check your computer manual for details.
Table 3-3
for
3.5.2 OTHER RS-232 LINES
Some host computers or other RS-232 devices use additional communication lines that are not required by the 12LS.
These include:
RTS - Ready to Send DSR - Data Set Ready
CTS - Clear To Send DTR - Data Terminal Ready
If the host computer uses RTS and CTS or DSR and DTR, these lines should be connected together in pairs [or as
shown in the computer manual]. Normally this is done in the RS-232 connector hood at the host computer.
Alternately, the effect of these lines can be eliminated in software. The ANAFAZE 12LS is ready to receive data;
therefore these lines are not required.
3-16
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